Professors test nutrition value of different types of feed on milk production of cows in experimental dairy farm
College Park Maryland USA Date:1957 Duration:1 min 45 sec Sound:Yes
Professor with a cow at University of Maryland experimental dairy farm in College Park, Maryland. Calves eating. A cow is injected with small dose of radioactive isotope to trace efficiency of feed conversion into milk. A professor takes milk sample from the cow. The milk is analyzed in a laboratory. Various laboratory instruments and Professors working with them.
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